ETEE 4351 CH7

Which one of the following timer parameters represents the value that increments as the timer is timing.?

Accumulated time.

For the programmed timer circuit shown, the ____ bit of the timer functions similar to a timed contact. DN EN PB1 PB2

DN

For the programmed timer circuit shown, assume the switch is closed for 5 seconds and then opened. After 12 seconds have elapsed motor(s) ____ will still be operating M1, M2, M3 M2, M3 M3 none of these

M3

For the program shown, the timer accumulated time is set to zero anytime: PB1 is closed. PB2 is closed. PB1 is open. PB2 is open.

PB2 is closed.

The amount of time for which a timer is programmed is called the:

Preset

The timer file for SLC 500 controllers is:

T4

For the on-delay timer instruction shown the timer number is: 0 200 T4:3 0.1

T4:3

Which one of the following timer parameters determines the accuracy of the timer?

Time base.

For the programmed timer circuit shown, when the switch is initially closed motor(s) _____ start(s) immediately. M1 M2 M3 all of these

all of these

Certain contacts of a mechanical timing relay are designed to operate at a preset time interval:

either after the coil is energized or after the coil is de-energized.

For the timer program shown, output B is switched ON when: power is applied. input A is closed. the timer is accumulating time. the accumulated value equals the preset value.

input A is closed.

For the programmed timers shown, the output of timer T4:5 : turns on after a 10-s time delay and remains on. turns off after a 2-s time delay and remains off. turns on after a 3-s time delay and remains on. is pulsed on and off at 1-s intervals

is pulsed on and off at 1-s intervals.

The on-delay timer (TON) starts timing when the timer's:

ladder rung switches from false to true.

To reset a retentive timer, the: AC time must be greater than the PR time. PR time must be greater than the AC time. AC time must equal the PR time. none of these.

none of these.

The type of timer program shown is a: retentive on-delay. retentive off-delay. nonretentive off-delay. nonretentive on-delay.

nonretentive on-delay.

The interconnecting of timers is commonly called:

sequencing

For the timer program shown, output D is switched ON when: power is applied. input A is closed. the timer is accumulating time. the accumulated value equals the preset value.

the accumulated value equals the preset value.

For the timer program shown, output C is switched ON when: power is applied. input A is closed. the timer is accumulating time. the accumulated value equals the preset value.

the timer is accumulating time.

Unlike the TON timer, the RTO timer requires a(n):

timer reset instruction.

The relay contact drawn is designed to operate so that: when the relay coil is energized, there is a time delay in closing. when the relay coil is energized, there is a time delay in opening. when the relay coil is de-energized, there is a time delay before the contact opens. when the relay coil is de-energized, there is a time delay before the contact closes.

when the relay coil is de-energized, there is a time delay before the contact closes.